Insulator-support for towers.



J. W. WARD.

INSULATOR SUPPORT FOR TOWERS.

APPLICATION HLED DEC. 24. I915.

Patented A11 21, 1917.

Snow Wow UNI ED STATES PATENT OFFICE. A

JOHN w. Wm, 01 LATnonn, PENNSYLVANIA, AssieNoa To TnE-rITTsnUne BronVOLTAGE INSULATOR 00., onnnnny, rnNNsYLvANI'A.

INsoLAToa-sUrroaT Ton TOWERS.

Specification of Letters Patent.

Patented Aug. 21, 1917.

Application filed December 24, 1915. Serial No. 88,489.

To all whom it may concern:

Be it known that 1, JOHN WARD a citizen of the United States, residingat atrobe, in the county of Westmoreland and State of Pennsylvania, haveinvented certain new and useful Improvements in Insulator-Supports forTowers, of which the following is a specification.

This invention relates to an improvement in insulator supports fortowers, and the object is to provide an insulated base for support andinsulation of electrlc conductors, and especially for use in connectionwith currents of high voltage,.the invention consisting of a series ofplates or disks built in I combination to form an insulated base forsupport of heavy towers, and which are constructed of solid material forcompresslve strength to sustain heavy loads.

The invention consists of certain novel features of construction andcombinations of parts which will be hereinafter described and pointedout in the claims.

In the accompanying drawings Figure 1 is a longitudinal verticalsectional view through the invention; and

Fig. 2 is an enlarged detail sectional view.

A, represents an iron base, which is provided with a recess 1, andmounted on the base is an insulating plate 2, preferably constructed ofporcelain, which has a recess 3 formed in its upper and lower sides. The

recess 3 on one side of the plate registers with the recess 1 of theiron base A, and received in the recesses 1 and 3 is an insulating disk4, which may be made of porcelain. The base, disk and plate areall'connected together by cement.

All of the plates are preferably constructed alike, and the disk 4 isinterposed between the adjacentplates and received in the recesses 3thereof, so that the plates and disk can be connected together by theintroduction of cement therebetween. As shown in the drawings, the outersurface or periphery of the disk 4 is corrugated, and the inner surfaceof the plates or wall of the recesses 3 is corrugated, for forming arough surface which will form asurface for the cement to adhere to forforming a secure connection between the parts.

' It is essential in connecting the several parts together that thereare. no breaks or air spaces, and to overcome this, a coating it willtake up the uneven surfaces formed on the disks and plates caused by adistortion in the firing operation.

In making the tests, it has been found that to obtain the highestefficiency that all of the parts must be securely connected together byintroducing a coating of cement which will cover the entire engagingsurfaces of the members, so that no air spaces or breaks may be found.With an insulator constructed in the manner set forth, wherein the partsare coated with cement, that is their joining surfaces, which were nineinches square, it stood over a million pounds test without anydifficulty. Yet, with an insulator which was not coated with the cementwhere the several members join, the insulator would only stand a test offrom two hundred and fifty thousand to three hundred thousand poundspressure.

It is also essential that the surfaces of the metal base A, and themetal cap 5 which is mounted upon the uppermost plate 1, should have alike surface,that is, the surfaces should be parallel. They should bemachined so that they are absolutely parallel so that when the strain isplaced upon the insulation, the strain will be distributed equallythroughout the insulated block, and not at some fractional portion ofthe block. Naturally if the strain is not equally distributed, thedblockwill be unable to withstand the loa The cap 5 is providedv with a recess6 in which the uppermost disk 4 is received, and

.cement is placed between the disk and cap ticoat effect is to increasethe cree age distance under normal conditions w en it is raining orstorming.

I claim:

1. An insulating support for towers for high-tension conductorscomprising a plurality of solid insulating members provided withrecesses upon both sides, flat disks substantially of the same thicknessas the distance between the recesses, and received therein for connectinthe plates together, a base and cap provide with recesses adapted to be'received upon the two end disks, and means for connecting the severalparts together.

2. An insulating support for towers for I high tension conductorscomprising a plurality of solid insulating members provided with re uponboth sides, the combined depths of which equal the thickness of theintervening spaces, flat disks substantially the same t ickness as the saces between the recesses, received within t e recesees, thereby forminga plurality of supporting surfaces of equal strength, a base and caprovided with recesses and ada ted to received upon the two end dis s,and means for connecting the several parts together.

In testimony whereof I aflix my signature, in the presence of twowitnesses.

JOHN W. WARD. Witnesses:

ANNA E. WATSON, W. ARTHUR Emucx.

